Royal DJ prank tried to alter nurse's voice

2DayFM Royal prank DJ Mel Grieg says she urged her bosses not to use the voice of a nurse who took her own life after the skit aired.

Grieg, who is yet to regain employment following the 2012 prank, said her mother has received death threats and that she should have tried harder to prevent the prank from going to air.

In December 2012 Grieg and co-presenter Michael Christian called a hospital where Kate Middleton was being treated for morning sickness during her pregnancy and pretended to be the Queen and her son Prince Charles.

The hospital fell for the prank and three days later Jacintha Saldanha - the nurse who had transferred the call - was found hanged.

Her suicide note blamed Christian and Grieg for her death.

"I felt like a failure as a human being," Ms Grieg told the Sunday Night program.

"I am ashamed of myself. I should have tried harder to not let that prank call air."